Perfect for On-The-Go The SHARKK USB (Universal Serial Bus) Hub is just as well suited for travel as it is for everyday use. Use it to instantly transform one of your laptop USB (Universal Serial Bus) ports into four to help keep all of your devices fully juiced! System Requirements Windows XP / Vista / 7 / 8, Mac OS 9.1 & above. Mac OS X Lion 10.7.4 users should upgrade to Mountain Lion 10.8.2 or later to avoid unstable connections. Featuring 4 USB (Universal Serial Bus) 3.0 ports with data transfer speeds of up to 5 Gbps (Note: actual rate will depend on the capability of your device.) The convenience & enhanced functionality offered by the SHARKK Bus-Powered USB (Universal Serial Bus) Hub makes it the perfect computer & laptop companion. No drivers or installation required. in addition, the USB (Universal Serial Bus) Hub is equipped with an LED power indicator & advanced built-in surge protection technology for your safety. Key Features LED power indicator Built-in surge protector Hot-swapping support Cable Type: USB (Universal Serial Bus) Compatible Devices: Laptop, PC, Tablet Connector Type: USB (Universal Serial Bus) 3.0 Data Transfer Rate: 5.0 gigabits_per_second Please Note: This hub is not meant to serve as a st&-alone charger. Due to its current of 0.9A per port which is a combined current of 5V 900m A, do not connect it to high power-consuming devices (such as HDDs, certain office equipment, etcâ¦), or high-output devices (such as iPad). Some USB (Universal Serial Bus) 3.0 devices require direct connection to host ports. 2.4 Ghz wireless devices (keyboards, mice, etc.) may not work around USB (Universal Serial Bus) 3.0 ports. Try using a USB (Universal Serial Bus) 2.0 connection.